COVID-19 Guidance Statement

1. The special pathway to diagnose and isolate patients/HCPs with or at high-risk of COVID-19;

2. Delivery of adequate personal protective equipment (PPE) to all the staff that is in direct contact with patients.

1. Use of surgical mask, gloves and hairnet to prevent COVID-19 hospital-based transmission;

2. Daily self-triage for COVID-19 symptoms/signs (see below);

3. Criteria for suspecting, isolating, and diagnosis of COVID-19 patients.

1. Postpone all procedures at low-risk of major causes of GI-related morbidity/mortality (Table 1);

2. Case-by-case assessment of those procedures with high-risk of GI-related morbidity/mortality according to the baseline GI-risk and the risk of severe diseases in the case of COVID-19, such as:

   1. Respiratory cancer;
   2. Age >60 years;
   3. Non-oncological comorbidities.

1. Fever >37.5C°;
2. Cough;
3. Dyspnea;
4. Exposure to patients with such symptoms/signs, COVID-19 disease, or travelling to high-risk areas.

1. Isolation in separated rooms with bathroom. If not available, patients must be separated by at least 2 meters from other patients in ventilated rooms;
2. Use of physical barriers (plexigas), surgical mask and cough etiquette;
3. Exposure to the fewest number of HCPs, consistent with adequate care;
4. Cleaning and disinfection after each case.

1. Surgical mask for all patients and staff if available. If not, at least for any HCPs who are in contact with patients, and for patients at high risk of, or are infected with COVID-19;
2. N95 or equivalent and goggles/facial shield for all HCPs in direct contact with the patient during upper GI-endoscopic procedures. If not available, double surgical mask (patient/HCP) should be provided at least for high-risk infected cases;
3. Gloves, water-proof gown, hairnet, shoe cover for all procedures. Gowning must be performed as recommended.

1. In high-risk areas/high-risk or infected cases, only the minimum HCPs with adequate expertise should be involved in the procedure. Trainee involvement must be avoided; 

2. High-risk or infected patients should be scoped in a negative pressure room. If not available, a fixed and isolated room only for such cases should be used.

1. Doffing must be performed as recommended;
2. Disinfection of the scope as by standard procedure;
3. Cleaning and disinfection of the room after any COVID 19 high-risk or infected cases;
4. Separated or isolated recovery room for high-risk/infected cases.

1. Postponement of non-urgent elective operations. Patients who are scheduled to undergo surgery for benign upper-GI disorders such as hiatal hernia repair should be postponed to avoid exposing patients and HCP to unnecessary risk of COVID-19 transmission;
2. Consideration of alternative non-operative management for selected upper-GI diseases. Patients with gastroesophageal acid reflux could be temporarily managed with proton pump inhibitors instead of fundoplication;
3. Operating theatres, surgical wards should regularly monitor and confirm the adequacy of PPE, surgical masks, N95 respirators. Operations may need to be cancelled if the stock of these equipment runs low.

A list of proposed elective UGI surgical procedures to be postponed is provided in Table 2.

1. Patients should be assessed and triaged for the risk of COVID-19 one day before surgery. Patients who fulfill the criteria in Statement 4 should be properly investigated with COVID-19 diagnostic tests. They should also be kept in isolated separate rooms with precautions taken as Statement 5, until diagnostic tests rule out active infection;

2. Adequate preoperative planning and communication should be conducted between the operating team, including anaesthetists, surgeons and operating room nursing staff, specifically related to the risk of COVID-19 transmission of each patient and preventive measures to be taken during the operation;

3. The use of laparoscopy could be associated with viral contamination from aerosol formation. It should be avoided in cases with suspicion of COVID-19 infection. Both the United Kingdom and American surgical societies suggest against the use of laparoscopy unless the benefits obviously outweigh the risks[13,14].

1. All airway procedures are considered as aerosol-generating. Endotracheal intubation and extubation should be performed inside the theatre and with minimal required HCP and with N95 or equivalent and goggles/facial shield in addition to standard protective gears. Endoscopists, surgeons, and their teams should stay out of the room during, and for 10 minutes after intubation or extubation;

2. Surgical staff should also be minimized throughout the operation. This will not only reduce the risk of COVID-19 transmission but also conserve PPE / surgical masks. No visitor should be allowed in any operating theatres, endoscopy suites, or other patient care areas;

3. During transthoracic esophagectomy, if a bronchial blocker is used for one-lung ventilation, all personnel should wear N95 respirator or equivalent due to the presence of an open circuit in the ventilating machine;

4. If a laparoscopic procedure is to be performed, the use of a device to filter the released CO2 for aerosolized particles should be considered.

1. Operations should be avoided as much as possible while the patient still tests positive for the virus unless the surgery is deemed life-saving and needs to be performed immediately;

2. CO2 insufflation should be avoided during transthoracic esophagectomy in COVID-19 cases; 

3. Operations should be performed in an operating theatre with negative pressure airflow, and all staff should be equipped with N95 or equivalent, goggles/facial shield throughout the procedure;  

4. Cleaning and disinfection of the operating theatre should be performed after COVID-19 cases according to CDC standards[15,16]: Routine cleaning and disinfection procedures using an EPA-registered, hospital-grade disinfectant from List N, are appropriate for SARS-CoV-2 in healthcare settings. Upon the patient leaving the room, re-entry should be delayed until sufficient time has elapsed for enough air changes to remove aerosolized infectious particles.

1. A case series from China reported a higher rate of severe events among cancer patients who suffered from COVID-19 infection, especially if they were on chemotherapy or had recent surgery[17]. It is recommended that careful selection of patients, balancing the benefits and risks to continue chemotherapy and radiotherapy, should be performed. Adjuvant therapy may be delayed in COVID-19 endemic areas in earlier stage upper-GI cancers after curative surgery;
2. It is important to evaluate the capacity of institutions for providing chemotherapy and radiotherapy, including the available staff and resources on protective gears. Government organizations such as NICE have issued a guidance note to prioritize patients based on the curability and risk-benefit ratio of chemotherapy and radiotherapy[18].

1. For those actively infected by COVID-19, transthoracic esophagectomy should be postponed until symptoms have resolved and clearance of the virus confirmed. The risk of severe pulmonary complications after one-lung ventilation in actively infected patients is a major concern; 
2. Closely monitor the capacity of intensive care units performing esophagectomy. For high-risk endemic regions with a shortage of intensive care support, it may be better to divert surgery to institutions with better capacity in ICU care.
3. For patients who received neoadjuvant chemoradiation, individualize the timing of surgery, balancing the risk of disease progression with the risk of surgery and COVID-19 infection. Patients who achieved complete clinical response may consider delaying the surgery for active surveillance. A recent study reported 11% false-negative rate with detailed endoscopic, EUS surveillance plus bite-on-bite biopsies[19].